Installation manual
PART 4: PREPARE BOILER (CONTINUED)
GAS-FIRED HOT WATER SUPPLY BOILER Boiler Manual
14
A. RELIEF VALVE
Connect discharge piping to a safe disposal location, follow the guidelines in the WARNING below.
PART 5: BOILER PIPING
n
WARNING
To avoid water damage or scalding due to relief valve operation:
• Discharge line must be connected to relief valve outlet and run to a safe place of disposal. Terminate
the discharge line in a manner that will prevent possibility of severe burns or property damage should
the valve discharge.
• Discharge line must be as short as possible and be the same size as the valve discharge connection
throughout its entire length.
• Discharge line must pitch downward from the valve and terminate at least 6” above the floor drain
where any discharge will be clearly visible.
• The discharge line shall terminate plain, not threaded, with a material serviceable for temperatures of
375 °F or greater.
• Do not pipe the discharge to any place where freezing could occur.
• No shutoff valve shall be installed between the relief valve and boiler, or in the discharge line. Do not
plug or place any obstruction in the discharge line.
• Test the operation of the valve after filling and pressurizing system by lifting the lever. Make sure the
valve discharges freely. If the valve fails to operate correctly, replace it with a new relief valve.
• Failure to comply with the above guidelines could result in failure of the relief valve to operate,
resulting in possibility of severe personal injury, death or substantial property damage.
enclosure. You can use either a solid
¾” in diameter black iron pipe or lift-
ing straps to lift the boiler off of its
shipping crate. You must have at least
two individuals to handle the boiler
properly to avoid damage as care
should be taken as the Mod Con is
very heavy. The Mod Con is also
equipped with leveling feet that can
be used to level the boiler properly if
the surface location is not level. If sur-
face flooring is rough, care should be
taken when sliding boiler into posi-
tion, you could catch the leveling feet
and damage the boiler if it is slid to its
location.
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